RCA MI-12188A preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The RCA MI-12188A is a tube power amplifier built for professional sound installations, not a guitar amp. A single input drives one half of a 6SL7, and the other half works as a paraphase inverter, so four 807 beam tetrodes run in parallel push-pull with cathode bias. There are no volume or tone controls, only a hum-balance pot. A 5R4 rectifier and 15H choke feed it, and 0D3 regulators hold the screens.

Tags: american, vintage, clean.

Schematic-derived preset files for the Neural DSP Quad Cortex and 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.